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No. 616,530. Patented Dec. 27,1898. s. H. & n. GAnsT.

HARRUW.

(Application filed 10, 189B.)

` (No Nudel.)

#i YZ A' y l v JID /i f l Y V j gg@ Q ffm/@winni 'e//o/efv lfzf.Cra/mv?? 2%/69/ Gra/ral B lUNTTnD STATES PATENT OFFICE.

STEPHEN ll. GARST AND DUDLEY GARST, OF DETROIT, MICHIGAN, ASSIGN- ORS TOTIIE AMERICAN I'IARROW COMPANY, OF SAME -PLACE.

HARROW.

SPECIFICATION forming part of Letters Patent No. 616,530, dated December27, 1898.

Application filed March 10, 1898. Serial No. 673,338. (No model.)

To all ich/0712, t ntg/ concern:

Be it known that we, STEPHEN H. GARsT and DUDLEY GARsT, citizens of theUnited States, residing at Detroit, in the county of lVayne and State ofMichigan, have invented certain new and useful Improvements in Harrows,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention consists in the construction of au improved scraper devicefor harrows, and comprises a series of scraper-arms connected togetherwith a single spiral cam for actuating the connecting-bar; further, inthe construction of the scraper-bars of spring metal, so that any slightinequalities in the adjustment of the Scrapers to the disk will beovercome by the bending of the scraper-arms.

The invention further consists in the construction, arrangement, andcombination of the various parts, whereby the device is simplified andcheapened and rendered less liable to breakage, all as more fullyhereinafter described.

In the drawings, Figure l is a rear elevation of a barrow-gang, showing'our` improvement applied thereto. Fig. 2 is an enlarged elevation of theleft-hand end of the scraper device, showing the detail construction ofone of the Scrapers and the actuating device for them all. Fig. 3 is asectional perspective view illustrating the construction of the actuating device. Fig. 4 is an elevation ofl one of the scraper-arms andscraper-blades detached.

A represents the barrow-frame, and B one of the disk-gangs, connectedthereto in any desired manner and comprising, as shown, a series ofconcave-convex disks C, connected together and turning in a suitablebearing or bearings. It is necessary in such harrows to scrape out thedirt which may cling to the inner faces of the disk, and our inventionconsists in the construction of the scraper device therefor.

D is a bar or frame supported in any desii-ed manner in iixed relationto the diskgang an d comprising what we call for convenience ofdescription the scraper-frame.7 On the scraper-frame are a number ofbrackets E, preferably of cast metal and consisting of two plates a Z9,arranged at an angle to each other. The plate a is pivotally connectedat bottom and top with the frame D and the connecting-bar F,respectively, and the plate 5 5 b extends out therefrom at such an angleas will support the scraper-blade in the proper relation to the disks,as will more fully hereinafter appear.

The Scrapers comprise the scraper-arms G, 6o preferably formed by takinga fiat spring-bar and cutting it off to the desired lengths and securingat their lower ends the scraperblades H and at their upper endsdetachably connecting them to the plates b of the brackets E, the angleof the bearing-faces of these plates b being such as will hold thescraperblades in the proper relation to bear against the inner faces ofthe disks.

The means which we have shown for detach- 7o ably securing thescraper-arm to the bracket consists of a bolt I, passing through theupper end of the plate b of the bracket, having' a suitable nut, whichmay be removed, and thereby permitting of detaching the blade andreversing it. As but one edge of the scraperblade works at a time, it isevident that with this ability to reverse it we are enabled practicallyto double the life thereof. Ve preferabl y form on the plate Zi, nearthe lower end, 8o a lug or ear J, which acts as a guide for the scraperII and prevents its turning about the bolt I as a pivot.

We preferably provide means for adjusting each scraper arm or blade inrelation to its disk, although the device can be constructed so thatthis adjustment can be taken up by the spring of the scraper-armsthemselves. The adjustment we have shown consists of a set-screw K,passing through the lower por- 9o tion of the plate b and bearingagainst the under side of the scraper-arm G, so that by bending thescraper-arm itself by means of this screw we are enabled to eect themost accurate adjustment of each scraper in relation to its disk. As thetwist which would be required in such an arm as the arm Gr is providedfor by the angle at which the plate b stands, we are enabled to makethis scraperarm by simply cutting off a piece of spring-bar 1 oo to thedesired length, fastening the scraperblade to one end, and making a holeat the other end for the bolt I. The brackets E, also, are very simplein construction, as they may be simply castings.

As the connecting-bar F connects the upper ends of all the brackets E,we apply a single actuating device to that connecting-bar for all thescrapers. That actuating device we form as follows: L is a worm orworm-segment having an actuating arm or lever M and a hub N. The hub isapertured, and through it passes a suitable bolt or pin O, whichlikewise passes through apertures in the upper ends of the arms P,forming a U- shaped bracket, which in turn is connected to the bar orframe D. The worm L engages between lugs or bearings Q on theconnecting-bar F. \Vhile it is evident that by the use of the worm thedevice actuated thereby is in etect locked at any point of adjustment,still, owing to the jolting which the device gets, we deem it desirableto apply a brake to the worm or worm-segment to prevent its accidentalmovement, which would throw the Scrapers in when not desired. This brakewe form by clamping the arms P against the hub N by means of a suitablenut R on the end of the pin or bolt O. This nut we have shown providedwith apertured fingers S, through which a split pin T passes to lock itagainst accidental movement. The pin also passes through an aperture inthe end of the bolt.

The operation of the device may be effected by hand or by foot. IVepreferably arrange it with a short lever M in such a position that theoperator can move it with his foot either into or out of operativeposition.

It is evident that a movement of the lever M in one direction willengage the Scrapers with their disks with the connections described andlock them in that position Without the necessity of the operator holdinghis foot on the lever and that the spring of the scraper-bars themselveswill take care of the inequalities in the individual disks.

It is evident that if it is desired to arrange thescraper-bars at anydesired point near to the disks by the construction shown it may beeffected and that the actuating device Will be automatically locked atwhatever point it is moved to.

What we claim as our invention is- -l. In a harrow, a series ofscraper-arms (one for each disk), a connecting-rod between the arms anda single spiral cam for actuating the connecting-rod.

2. In a disk harrow, a scraper mechanism comprising the bar or frame D,the brackets E pivoted at one end thereto, the connectingbar. F to whichthe opposite ends of the brackets are pivoted, plates b on the bracketsstanding at such an angle to the supporting portion thereof as will holdthe scraper-blades in the desired position to the disks and the straightspring-bars G secured upon a plate b and the scraper-blade at the endthereof.

3. In a disk harrow, a scraper device therefor, comprising a bar Dsupported in proximity to the disks, the actuating connectingbar F, abracket secured to the frame D, the arms P on the bracket, a wormpivoted between these arms and engaging a bearing 0n the connecting-barF, and means for clamping the arms P against the worm to act as a braketherefor, substantially as and for the purpose described.

4. In a disk harrow, the combination with a supporting-bar, bracketspivoted thereto and comprising each plates ct and b extending at rightangles to each other, a lug or ear .I projecting from the plate Z) in adirection parallel with the plate tt and overhan ging the same,substantially as described.

5. In a disk harrow, the combination with two supporting-bars, means formoving one of said bars laterally with relation to the other, bracketspivoted to both of said bars, and comprising the plates a and b arrangedat right angles to each other, and means for securinggand adjustingscraper-arms to said brackets, substantially as described.

6. In a disk harrow, the combination with two supporting-bars,scraper-arms secured to said bars, and means for moving one of said barslaterally with relation to the other, comprising the bearings Q on oneof the bars, the worm L on the opposite bar and adapted to engage saidbearings and means for actuat ing the Worm, substantially as described.

7. In a disk harrow a series of scraperarms, a worm for actuating thescraper-arms with relation to their disks, and means for locking thesaid Worm in adjusted positions, comprising a bolt on which the worm ispivoted, a jam-nut engaging the end of the bolt, perforated earsprojecting outwardly from the nut, and a spring-pin adapted to passthrough the said ears and bolt, substantially as described.

8. In combination with a supporting-bar, a bracket secured theretocomprising plates aand b extending at right angles to each other, aspring-arm attached to the inner upper face of the portion b andextending downward therefrom, and a screw passing from the outsidethrough said portion b near its lower end and adapted to bear againstthe spring-arm to force the same inward, substantially as described.

In testimony whereof we aftix our signa-` IOO IIO

